The simplest example of the classical double copy starts with the Yang-Mills field arrangement due to a single color charge at the origin. When the dilaton and two-form field are tuned to zero [1]}, [2]}, this field double-copies to the Schwarzschild black hole metric. Indeed, the first classical double copy paper [3]} proposes a single copy field strength which double copies to the broader class of Kerr black holes in higher dimensions: they include general-dimension black holes with arbitrary spins but flat asymptotics.
